Having fun with Location
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Slides from the Droidcon 2013 conference. Amsterdam 24, 25 & 26 November 2013 http://www.droidcon.nl/
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Having fun with Location
- 1. Having fun with Location Antoon Uijtdehaag
- 2. The Location Platform for Apps
- 3. How accurate is Android GPS Cached GPS Cached Network Real-time GPS Real-time Network locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,time,distance, listener); locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,time,dist ance,listener); Passive <receiver android:name=".PassiveLocationChangedReceiver" android:enabled="true"/> NMEA addNmeaListener(GpsStatus.NmeaListener);
- 4. Flow for obtaining user location Portions of this page are reproduced from work created and shared by the Android Open Source Project and used according to terms described in theCreative Commons 2.5 Attribution License.
- 5. Real-time tracking locationManager. isProviderEnabled( LocationManager.GPS_PROVIDER ) locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER,0,0,listener); public void onLocationChanged(Location location) { if(location.getAccuracy() < 100.0 && location.getSpeed() < 6.95){ //Do something } else{ //Continue listening for a more accurate location } }
- 6. Is a consumer smartphone GPS good enough? Accuracy Rooftop <= 10 meters (desired result) Street >10 meters and <= 100 meters (let user know it’s close but not perfect. Good enough?) Neighborhood > 100 meters and <= 500 meters (give visual feedback that accuracy is low) City > 500 meters and <= 2000 meters (ask user to verify city name from a list) County > 2000 meters (prompt for manual location input)
- 7. Android GPS Testing Tool By Andy Gup www.andygup.net
- 11. Use ArcGIS iPhone and Android SDKs
- 12. Geotrigger Components • Condition (area) Polygon • Action (message, callback URL, or change tracking profile) • Tags (to group content) - Example: - Tags - Can Wikipedia article data for Buildings, History allow users to subscribe to a subset of the data
- 13. Setting a Geotrigger for a date and time Set the date and time in the dateFrom and dateTo fields.
- 14. Geotrigger Tracking Profiles Adaptive mode • Optimized for Geotrigger™ events • Will use less power when farther away from triggers and content Rough mode • Only gathers approximate location data • Good for determining if a device is in a given city or neighborhood • The most battery efficient
- 15. Data collected by one person in rough mode Portions of this page are reproduced from work created by Aaron Parecki
- 16. Geotrigger Tracking Profiles Real-time mode • Sends accurate location as fast as possible • Least battery efficient Logging • Tracks location data in areas of low connectivity • Sends to the server later, or when a connection re-occurs
- 17. Data collected by one person in real-time mode 2.5 million points since 2008 Portions of this page are reproduced from work created by Aaron Parecki
- 19. MapAttack.org Hit The Streets! Meet with a group of friends at the realworld location of your board, start the game, and run for glory!
Editor's Notes
- https://developers.arcgis.comhttps://developers.arcgis.com/en/android/guide/geocoding-and-place-search.htmFeatureshttps://developers.arcgis.com/en/features/Free Sign Uphttps://developers.arcgis.com/en/plans/Develop Freehttps://developers.arcgis.com/en/android/
- http://www.andygup.net/how-accurate-is-android-gps-part-1-understanding-location-data/
- http://developer.android.com/guide/topics/location/strategies.html#BestEstimateStart application.Sometime later, start listening for updates from desired location providers.Maintain a "current best estimate" of location by filtering out new, but less accurate fixes.Stop listening for location updates.Take advantage of the last best location estimate.
- http://stackoverflow.com/questions/843675/how-do-i-find-out-if-the-gps-of-an-android-device-is-enabledhttp://www.andygup.net/how-accurate-is-android-gps-part-2-consuming-real-time-locations/Start application using minTime = 0 and minDistance = 0. Use an aggressive setting to get accurate location as quickly as possible.Once accuracy is less than 50 meters and speed less than 45 mph set minTime = 5000 and minDistance = 25.Speed equals 0 for greater than 1 hour. Shut off location listeners and notify user.Battery gets low. Shut off location listeners and notify user.Rooftop <= 10 meters (desired result)Street >10 meters and <= 100 meters (let user know it’s close but not perfect. Good enough?)Neighborhood > 100 meters and <= 500 meters (give visual feedback that accuracy is low)City > 500 meters and <= 2000 meters (ask user to verify city name from a list)County > 2000 meters (prompt for manual location input)finalLocationManager manager = (LocationManager) getSystemService( Context.LOCATION_SERVICE ); if ( !manager.isProviderEnabled( LocationManager.GPS_PROVIDER ) ) { buildAlertMessageNoGps(); } private voidbuildAlertMessageNoGps() { finalAlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setMessage("Your GPS seemstobedisabled, do you want toenableit?") .setCancelable(false) .setPositiveButton("Yes", new DialogInterface.OnClickListener() { public voidonClick(@SuppressWarnings("unused") finalDialogInterfacedialog, @SuppressWarnings("unused") final int id) { startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS)); } }) .setNegativeButton("No", new DialogInterface.OnClickListener() { public voidonClick(finalDialogInterfacedialog, @SuppressWarnings("unused") final int id) { dialog.cancel(); } }); finalAlertDialog alert = builder.create(); alert.show(); }
- http://www.andygup.net/android-gps-testing-tool/
- https://developers.arcgis.com/en/geotrigger-service/Triggers when entering or leaving.http://coolmaps.esri.com/starbucks/Use CasesRetail and LoyaltyEngage loyal customers with personalized content and deals the moment they enter your store.Real EstateSend messages to prospective home buyers when their search criteria matches a home nearby.Energy ManagementUse your location to automatically manage power consumption in your home or office.TourismBring public attractions to life by informing tourists of interesting locations as they explore your city.Public AlertsNotify citizens about events such as road closures or civic emergencies based on past locations.Personalized OffersSend customized, individual offers to potential customers as they pass by your establishment.Data CollectionGroup related content with tagsLocation Checkpoint VerificationCreate triggers to represent each location. App monitors the location and records a point whenever client is at the location
- There’s great tech out there for dedicated GPS devices and real-time tech for devices running intensive GPS for short periods, In the ordinary world – everyone wants to be location-aware, but battery drain has been an issue. Consumer devices – the devices in your pockets vs. a dedicated GPS device. I thinkeveryone in this room has troublewith GPS being a totalbatteryhog. For on the go situations, we need a solution that prevents battery-drain while still providing location-based alerts and tracking. This is consumer-grade, ready for millions of devices. Holding back the market for consumer devices to get on using GPS.
- Example of GeoJSON format. Can add date and time conditions.
- http://aaronparecki.com/
- http://mapattack.org/